Expressions: Sql expressions with Duckdb (#81666)

duckdb temp storage of dataframes using parquet and querying from sql expressions
---------

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

pkg/expr/sql_command_test.go

@@ -0,0 +1,26 @@
+package expr
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestNewCommand(t *testing.T) {
+	cmd, err := NewSQLCommand("a", "select a from foo, bar", nil)
+	if err != nil && strings.Contains(err.Error(), "feature is not enabled") {
+		return
+	}
+
+	if err != nil {
+		t.Fail()
+		return
+	}
+
+	for _, v := range cmd.varsToQuery {
+		if strings.Contains("foo bar", v) {
+			continue
+		}
+		t.Fail()
+		return
+	}
+}